The stable oxygen isotope ratio of resin extractable phosphate derived from fresh cattle faeces.
Steven J GrangerYuguo YangVerena PfahlerChris HodgsonAndrew C SmithKate Le CocqAdrian L CollinsMartin S A BlackwellNicholas J K HowdenPublished in: Rapid communications in mass spectrometry : RCM (2018)
The fresh faecal δ18 OPO4 values were equivalent to those reported elsewhere for agricultural animal slurry. However, they were different from the Eδ18 OPO4 value calculated from the faecal δ18 OH2O value. Our results indicate that slurry PO4 is, in the main, derived from animal faeces although an explanation for the observed value range could not be determined.